50278 + Interview Questions in Physics Page 18 InterviewSolution

851.

Curent i is flowing through a wire of non-uniform cross-section as shown. Match the following two columns. Column-1 Column-2 (a) Current density(p) is more at 1(b) Electric field(q) is more at 2(c) Resistance per unit length(r) is same at both sections 1 and 2(d) Potential difference per unit length(s) Data insufficient

Answer»

Curent $i$ is flowing through a wire of non-uniform cross-section as shown. Match the following two columns.

Column-1
Column-2

$(a)$ Current density	$(p)$ is more at $1$
$(b)$ Electric field	$(q)$ is more at $2$
$(c)$ Resistance per unit length	$(r)$ is same at both sections $1$ and $2$
$(d)$ Potential difference per unit length	$(s)$ Data insufficient

Discussion

852.	The dimensional formula of mobility of holes or electrons in diode is
Answer» The dimensional formula of mobility of holes or electrons in diode is

Discussion

853.	60. A solid cube and a solid sphere of the same material have equal surface area. both of temperature 120? then which will cool faster and which will cool slower
Answer» 60. A solid cube and a solid sphere of the same material have equal surface area. both of temperature 120? then which will cool faster and which will cool slower

Discussion

854.	An object is subjected to a force in the north-east direction. To balance this force, a second force should be applied in the direction
Answer» An object is subjected to a force in the north-east direction. To balance this force, a second force should be applied in the direction

Discussion

855.	What is the SI unit of centrifugal force??
Answer» What is the SI unit of centrifugal force??

Discussion

856.	A cube of mass 2kg is held stationary against a rough wall by a force F=40N passing through centre C . Find perpendicular distance of normal reaction between wall and cube from point C .Side of the cube is 20 cm .Take g=10 ms-2 .
Answer» A cube of mass 2kg is held stationary against a rough wall by a force F=40N passing through centre C . Find perpendicular distance of normal reaction between wall and cube from point C .Side of the cube is 20 cm .Take g=10 ms-2 .

Discussion

857.	For a body moving in circular motion with a cons†an t angular velocity , thee magnitude of the average acceleration over a period of half a revolution is_______ times the magnitude of its ins†an t acceleratio
Answer» For a body moving in circular motion with a cons†an t angular velocity , thee magnitude of the average acceleration over a period of half a revolution is_______ times the magnitude of its ins†an t acceleratio

Discussion

858.	The sun (diameter d) subtends an angle x radian at the pole of a concave mirror of focal length f. What is the diameter of the image of the sun formed by the mirror?
Answer» The sun (diameter d) subtends an angle x radian at the pole of a concave mirror of focal length f. What is the diameter of the image of the sun formed by the mirror?

Discussion

859.	A wheel of radius 1 meter rolls forward half a revolution on a horizontal ground. The magnitude of the displacement of the point of the wheel initially in contact with the ground is
Answer» A wheel of radius 1 meter rolls forward half a revolution on a horizontal ground. The magnitude of the displacement of the point of the wheel initially in contact with the ground is

Discussion

860.	A glass flask of volume one litre at 0o C is filled, level full of mercury at this temperature. The flask and mercury are now heated to 100o C. How much mercury will spill out, if coefficient of volume expansion of mercury is 1.82×10−4/o C and linear expansion of glass is 0.1×10−4/o C respectively
Answer» A glass flask of volume one litre at $0^{o} C$ is filled, level full of mercury at this temperature. The flask and mercury are now heated to $100^{o} C$ . How much mercury will spill out, if coefficient of volume expansion of mercury is $1.82 \times 10^{- 4} /^{o} C$ and linear expansion of glass is $0.1 \times 10^{- 4} /^{o} C$ respectively

Discussion

861.	when a charge is at rest in uniform magnetic field and observer is moving then why force is acting as if think practically the condition then charge will be stationary buy if force acting it should move
Answer» when a charge is at rest in uniform magnetic field and observer is moving then why force is acting as if think practically the condition then charge will be stationary buy if force acting it should move

Discussion

862.	For the frame shown below, the fixed end moment developed at support A isPLk.The value of k (correct upto one decimal place) is_____.12
Answer» For the frame shown below, the fixed end moment developed at support A is $\frac{P L}{k}$ . The value of k (correct upto one decimal place) is_____. 12

Discussion

863.	Question 11Draw a labelled diagram of an electric motor. Explain its principle and working. What is the function of a split ring in an electric motor?
Answer» Question 11 Draw a labelled diagram of an electric motor. Explain its principle and working. What is the function of a split ring in an electric motor?

Discussion

864.	For what relation of v and ω, velocity of point P at θ=30∘ as shown in figure is vertical? Here v is velocity and ω angular velocity of ring.
Answer» For what relation of v and $ω$ , velocity of point P at $θ = 30^{\circ}$ as shown in figure is vertical? Here v is velocity and $ω$ angular velocity of ring.

Discussion

865.	A block rests on a rough plane whose inclination θ to the horizontal can be varied. Which of the following graphs indicates how the frictional force F between the block and the plane varies as θ is increased?
Answer» A block rests on a rough plane whose inclination $θ$ to the horizontal can be varied. Which of the following graphs indicates how the frictional force $F$ between the block and the plane varies as $θ$ is increased?

Discussion

866.	How one can have angular acceleration when ext force is zero?
Answer» How one can have angular acceleration when ext force is zero?

Discussion

867.	The bulk modulus of a spherical object is B. If it is subjected to uniform pressure p, the fractional decrease in radius is
Answer» The bulk modulus of a spherical object is B. If it is subjected to uniform pressure p, the fractional decrease in radius is

Discussion

868.	Which of the following functions of time represent (a) simple harmonic, (b) periodic but not simple harmonic, and (c) non-periodic motion? Give period for each case of periodic motion (ω is any positive constant):(a) sin ωt – cos ωt(b) sin3 ωt(c) 3 cos (π/4 – 2ωt)(d) cos ωt + cos 3ωt + cos 5ωt(e) exp (–ω2t2)(f) 1 + ωt + ω2t2
Answer» Which of the following functions of time represent (a) simple harmonic, (b) periodic but not simple harmonic, and (c) non-periodic motion? Give period for each case of periodic motion (ω is any positive constant): (a) sin ωt – cos ωt (b) sin³ ωt (c) 3 cos (π/4 – 2ωt) (d) cos ωt + cos 3ωt + cos 5ωt (e) exp (–ω²t²) (f) 1 + ωt + ω²t²

868.

Which of the following functions of time represent (a) simple harmonic, (b) periodic but not simple harmonic, and (c) non-periodic motion? Give period for each case of periodic motion (ω is any positive constant):(a) sin ωt – cos ωt(b) sin3 ωt(c) 3 cos (π/4 – 2ωt)(d) cos ωt + cos 3ωt + cos 5ωt(e) exp (–ω2t2)(f) 1 + ωt + ω2t2

Answer»

Which of the following functions of time represent (a) simple harmonic, (b) periodic but not simple harmonic, and (c) non-periodic motion? Give period for each case of periodic motion (ω is any positive constant):

(a) sin ωt – cos ωt

(b) sin³ ωt

(c) 3 cos (π/4 – 2ωt)

(d) cos ωt + cos 3ωt + cos 5ωt

(e) exp (–ω²t²)

(f) 1 + ωt + ω²t²

Discussion

869.	A 800 microferad capacitor is charged at the steady rate of 50 microcoulomb per second.how long will it take to rise its potential to 10 volt?
Answer» A 800 microferad capacitor is charged at the steady rate of 50 microcoulomb per second.how long will it take to rise its potential to 10 volt?

Discussion

870.	125.Three capacitor are connected in series having effective capacitance of 4microF if one of the capacitor is removed then the net capacitance is increased to 6 microF what is the capacitance of removed capacitor
Answer» 125.Three capacitor are connected in series having effective capacitance of 4microF if one of the capacitor is removed then the net capacitance is increased to 6 microF what is the capacitance of removed capacitor

Discussion

871.	5.From a circular disc of radius R and mass 4Ma small disc of radius is removed from the discas shown. The moment of inertia of the remainingdisc about an axis perpendicular to the plane of thedisc and passing through O is2(1) MR13(2) MR2(3) MR4(4) MR
Answer» 5.From a circular disc of radius R and mass 4Ma small disc of radius is removed from the discas shown. The moment of inertia of the remainingdisc about an axis perpendicular to the plane of thedisc and passing through O is2(1) MR13(2) MR2(3) MR4(4) MR

Discussion

872.	a proton and a alpha particle are accelerated through same potential difference. calculate the ratio of the respective de broglie wavelength
Answer» a proton and a alpha particle are accelerated through same potential difference. calculate the ratio of the respective de broglie wavelength

Discussion

873.	A particle is projected from ground with speed 80 m/s at an angle 30^0 with horizontal from ground the magnitude of average velocity of particle in time interval t=2s to t=6s is
Answer» A particle is projected from ground with speed 80 m/s at an angle 30^0 with horizontal from ground the magnitude of average velocity of particle in time interval t=2s to t=6s is

Discussion

874.	A capacitor of capacitance 50microF is changed with 10V. The energy of the capacitor is?
Answer» A capacitor of capacitance 50microF is changed with 10V. The energy of the capacitor is?

Discussion

875.	A particle starts oscillating simple harmonically from its equilibrium position. Then the ratio of kinetic and potential energy of the particle at time T12 is(T= time period and assume potential energy at equilibrium position=0)
Answer» A particle starts oscillating simple harmonically from its equilibrium position. Then the ratio of kinetic and potential energy of the particle at time $\frac{T}{12}$ is ( $T =$ time period and assume potential energy at equilibrium position $= 0$ )

Discussion

876.	Find minimum value of l so that truck can avoid the dead end, without toppling the block kept on it.
Answer» Find minimum value of $l$ so that truck can avoid the dead end, without toppling the block kept on it.

Discussion

877.	A projectile has a range R and time of flight T. If the range is doubled by increasing the speed of projection, without changing the angle of projection, the time of flight will become
Answer» A projectile has a range R and time of flight T. If the range is doubled by increasing the speed of projection, without changing the angle of projection, the time of flight will become

Discussion

878.	A charged particle with charge q enters a region of constant ,uniform abd mutually orthogonal fields E vector and B vector with a velocity Vvector perpendicular to both E vector and B vector, and comes out without any change in magmituse or direction of V vector, then V vector will be in terms of B and E
Answer» A charged particle with charge q enters a region of constant ,uniform abd mutually orthogonal fields E vector and B vector with a velocity Vvector perpendicular to both E vector and B vector, and comes out without any change in magmituse or direction of V vector, then V vector will be in terms of B and E

Discussion

879.	The electric potential varies in space according to the relation V=3x+4y. A particle of mass 0.1kg starts from rest from point (2,3.2) under the influence of this field. The charge on the particle is +1μC. Assume V and (x,y) are in S.I. units The velocity of the particle when it crosses the x - axis is
Answer» The electric potential varies in space according to the relation $V = 3 x + 4 y .$ A particle of mass $0.1 k g$ starts from rest from point $(2, 3.2)$ under the influence of this field. The charge on the particle is $+ 1 μ C .$ Assume V and $(x, y)$ are in S.I. units The velocity of the particle when it crosses the x - axis is

Discussion

880.	A uniform rod of length L and mass m is placed on rough horizontal surface.If coefficient of friction is μ=kx,where k is constant and μ exist for 0≤ x≤ L (i.e for x>L friction is zero.). If rod moves towards the right, magnitude of work done by friction is:
Answer» A uniform rod of length L and mass m is placed on rough horizontal surface.If coefficient of friction is $μ = k x$ ,where k is constant and $μ$ exist for $0 \leq x \leq L$ (i.e for $x > L$ friction is zero.). If rod moves towards the right, magnitude of work done by friction is:

Discussion

881.	A solid cylinder of mass M and radius R rolls down an inclined plane of height h. The angular velocity of cylinder when it reches bottom of plane will
Answer» A solid cylinder of mass M and radius R rolls down an inclined plane of height h. The angular velocity of cylinder when it reches bottom of plane will

Discussion

882.	What is deviation of light
Answer» What is deviation of light

Discussion

883.	In a compound microscope, the focal length of objective lens is 1.2 cm and that of eyepiece is 3 cm. When the object is kept at 1.25 cm in front of the objective, the final image is formed at infinity. Magnifying power of the compound microscope is
Answer» In a compound microscope, the focal length of objective lens is $1.2 cm$ and that of eyepiece is $3 cm$ . When the object is kept at $1.25 cm$ in front of the objective, the final image is formed at infinity. Magnifying power of the compound microscope is

Discussion

884.	Find the derivative of sin(x+a) where a is a fixed non-zero constant.
Answer» Find the derivative of $sin (x + a)$ where $a$ is a fixed non-zero constant.

Discussion

885.	An un deformed spring of spring constant k is connected to a bead of mass m as shown in figure. Bead can move along long rigid rod without friction. A particle of mass m moving with velocity v in the vertical plane containing spring and rod strikes bead at an angle 45∘ with horizontal and sticks to bead. Choose correct alternative representing maximum elongation of spring if all particles are in same horizontal plane.
Answer» An un deformed spring of spring constant k is connected to a bead of mass m as shown in figure. Bead can move along long rigid rod without friction. A particle of mass m moving with velocity v in the vertical plane containing spring and rod strikes bead at an angle $45^{\circ}$ with horizontal and sticks to bead. Choose correct alternative representing maximum elongation of spring if all particles are in same horizontal plane.

Discussion

886.	A planet of mass m moves along an ellipse so that perihelion and aphelion distances are r1 and r2 respectively. Find the angular momentum of the planet. Assume Ms to be the mass of the sun.
Answer» A planet of mass $m$ moves along an ellipse so that perihelion and aphelion distances are $r_{1} and r_{2}$ respectively. Find the angular momentum of the planet. Assume $M_{s}$ to be the mass of the sun.

Discussion

887.	An elevator car, whose floor to ceiling distance is equal to 2.7 m, starts ascending with constant acceleration of 1.2ms−2. 2 sec after the start, a bolt begins fallings from the ceiling of the car. The free fall time of the bolt is
Answer» An elevator car, whose floor to ceiling distance is equal to 2.7 m, starts ascending with constant acceleration of $1.2 m s^{- 2}$ . 2 sec after the start, a bolt begins fallings from the ceiling of the car. The free fall time of the bolt is

Discussion

888.	is speed always equal to ins†an teneous speed and velocity always equal to ins†an teneous velocity
Answer» is speed always equal to ins†an teneous speed and velocity always equal to ins†an teneous velocity

Discussion

889.	A small mass m is transferred from the centre of a hollow sphere of mass M and radius R to infinity. During this process W1=100 kJ amount work is done. If instead of a hollow sphere, a solid sphere of mass M2 and radius R3 were there, then W2 amount of work is done. The W2 will be
Answer» A small mass $m$ is transferred from the centre of a hollow sphere of mass $M$ and radius $R$ to infinity. During this process $W_{1} = 100 kJ$ amount work is done. If instead of a hollow sphere, a solid sphere of mass $\frac{M}{2}$ and radius $\frac{R}{3}$ were there, then $W_{2}$ amount of work is done. The $W_{2}$ will be

Discussion

890.	A particle is moving with uniform acceleration along a straight line ABC. Its velocity at'A' and 'B'are 6 m/s and 9 m/s respectively.If AB BC 5:16 then its velocity at 'C' is
Answer» A particle is moving with uniform acceleration along a straight line ABC. Its velocity at'A' and 'B'are 6 m/s and 9 m/s respectively.If AB BC 5:16 then its velocity at 'C' is

Discussion

891.	A metallic ball of mass 20 kg moving with a velocity of 5 m/s collides with a small plastic ball of mass 5 g initially at rest. What is the final velocity of the plastic ball?
Answer» A metallic ball of mass $20 kg$ moving with a velocity of $5 m/s$ collides with a small plastic ball of mass $5 g$ initially at rest. What is the final velocity of the plastic ball?

Discussion

892.	Determine apparent depth of the beaker.
Answer» Determine apparent depth of the beaker.

Discussion

893.	An equilateral uniform prism of mass m rests on a rough horizontal surface with coefficient of friction μ and a horizontal force F is applied. If the coefficient of friction is sufficiently high so that the prism does not slide before toppling, then the minimum force required to topple the prism is:
Answer» An equilateral uniform prism of mass $m$ rests on a rough horizontal surface with coefficient of friction $μ$ and a horizontal force $F$ is applied. If the coefficient of friction is sufficiently high so that the prism does not slide before toppling, then the minimum force required to topple the prism is:

Discussion

894.	Explain the whole potentiometer , its working and applications also?
Answer» Explain the whole potentiometer , its working and applications also?

Discussion

895.	101 two unequal and opposite force are applied tangentionally to form a uniform disc of mass m and radius r.if the disc is pivotedc at its centre and is free to rotate in its plane,the angular acceleration of the disc is ?
Answer» 101 two unequal and opposite force are applied tangentionally to form a uniform disc of mass m and radius r.if the disc is pivotedc at its centre and is free to rotate in its plane,the angular acceleration of the disc is ?

Discussion

896.	Two particles of masses \(m_1 and are separated by a distance r. If the masses are interchanged, the shift in the centre of mass of the system will be
Answer» Two particles of masses \(m_1 and are separated by a distance r. If the masses are interchanged, the shift in the centre of mass of the system will be

Discussion

897.	The force required to stretch a steel wire of 1cm2 cross - section to 1.1 times its length would be (Y=2×1011Nm−2)
Answer» The force required to stretch a steel wire of $1 c m^{2}$ cross - section to 1.1 times its length would be $(Y = 2 \times 10^{11} N m^{- 2})$

Discussion

898.	A man is running with velocity 5km/h towards east and rain is falling vertically down with speed 5km/h. Direction of rain w.r.t man is-(a) 30 degree with vertical (b) 60 degree with vertical (c) 45 degree with vertical (d) 90 degree with vertical
Answer» A man is running with velocity 5km/h towards east and rain is falling vertically down with speed 5km/h. Direction of rain w.r.t man is- (a) 30 degree with vertical (b) 60 degree with vertical (c) 45 degree with vertical (d) 90 degree with vertical

898.

A man is running with velocity 5km/h towards east and rain is falling vertically down with speed 5km/h. Direction of rain w.r.t man is-(a) 30 degree with vertical (b) 60 degree with vertical (c) 45 degree with vertical (d) 90 degree with vertical

Answer»

A man is running with velocity 5km/h towards east and rain is falling vertically down with speed 5km/h. Direction of rain w.r.t man is-

(a) 30 degree with vertical

(b) 60 degree with vertical

(c) 45 degree with vertical

(d) 90 degree with vertical

Discussion

899.	अगले दिन दोनों बिल्लियों को एक तरबूज़ मिला। दोनों सोचने लगीं, इस तरबूज़ को कैसे बाँटा जाए कि तभी फिर से बंदर आ गया। आगे क्या हुआ होगा?..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Answer» अगले दिन दोनों बिल्लियों को एक तरबूज़ मिला। दोनों सोचने लगीं, इस तरबूज़ को कैसे बाँटा जाए कि तभी फिर से बंदर आ गया। आगे क्या हुआ होगा? .............................................................................................................................. .............................................................................................................................. .............................................................................................................................. .............................................................................................................................. .............................................................................................................................. .............................................................................................................................. ..............................................................................................................................

899.

अगले दिन दोनों बिल्लियों को एक तरबूज़ मिला। दोनों सोचने लगीं, इस तरबूज़ को कैसे बाँटा जाए कि तभी फिर से बंदर आ गया। आगे क्या हुआ होगा?..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

Answer»

अगले दिन दोनों बिल्लियों को एक तरबूज़ मिला। दोनों सोचने लगीं, इस तरबूज़ को कैसे बाँटा जाए कि तभी फिर से बंदर आ गया। आगे क्या हुआ होगा?

..............................................................................................................................

Discussion

900.	Molecular weight of X2O3 is 326.the equivalent weight of X is?
Answer» Molecular weight of X2O3 is 326.the equivalent weight of X is?

Discussion

Explore topic-wise InterviewSolutions in .

The dimensional formula of mobility of holes or electrons in diode is

60. A solid cube and a solid sphere of the same material have equal surface area. both of temperature 120? then which will cool faster and which will cool slower

An object is subjected to a force in the north-east direction. To balance this force, a second force should be applied in the direction

What is the SI unit of centrifugal force??

A cube of mass 2kg is held stationary against a rough wall by a force F=40N passing through centre C . Find perpendicular distance of normal reaction between wall and cube from point C .Side of the cube is 20 cm .Take g=10 ms-2 .

For a body moving in circular motion with a cons†an t angular velocity , thee magnitude of the average acceleration over a period of half a revolution is_______ times the magnitude of its ins†an t acceleratio

The sun (diameter d) subtends an angle x radian at the pole of a concave mirror of focal length f. What is the diameter of the image of the sun formed by the mirror?

A wheel of radius 1 meter rolls forward half a revolution on a horizontal ground. The magnitude of the displacement of the point of the wheel initially in contact with the ground is

when a charge is at rest in uniform magnetic field and observer is moving then why force is acting as if think practically the condition then charge will be stationary buy if force acting it should move

For the frame shown below, the fixed end moment developed at support A isPLk.The value of k (correct upto one decimal place) is_____.12

Question 11Draw a labelled diagram of an electric motor. Explain its principle and working. What is the function of a split ring in an electric motor?

For what relation of v and ω, velocity of point P at θ=30∘ as shown in figure is vertical? Here v is velocity and ω angular velocity of ring.

A block rests on a rough plane whose inclination θ to the horizontal can be varied. Which of the following graphs indicates how the frictional force F between the block and the plane varies as θ is increased?

How one can have angular acceleration when ext force is zero?

The bulk modulus of a spherical object is B. If it is subjected to uniform pressure p, the fractional decrease in radius is

A 800 microferad capacitor is charged at the steady rate of 50 microcoulomb per second.how long will it take to rise its potential to 10 volt?

125.Three capacitor are connected in series having effective capacitance of 4microF if one of the capacitor is removed then the net capacitance is increased to 6 microF what is the capacitance of removed capacitor

5.From a circular disc of radius R and mass 4Ma small disc of radius is removed from the discas shown. The moment of inertia of the remainingdisc about an axis perpendicular to the plane of thedisc and passing through O is2(1) MR13(2) MR2(3) MR4(4) MR

a proton and a alpha particle are accelerated through same potential difference. calculate the ratio of the respective de broglie wavelength

A particle is projected from ground with speed 80 m/s at an angle 30^0 with horizontal from ground the magnitude of average velocity of particle in time interval t=2s to t=6s is

A capacitor of capacitance 50microF is changed with 10V. The energy of the capacitor is?

A particle starts oscillating simple harmonically from its equilibrium position. Then the ratio of kinetic and potential energy of the particle at time T12 is(T= time period and assume potential energy at equilibrium position=0)

Find minimum value of l so that truck can avoid the dead end, without toppling the block kept on it.

A projectile has a range R and time of flight T. If the range is doubled by increasing the speed of projection, without changing the angle of projection, the time of flight will become

A uniform rod of length L and mass m is placed on rough horizontal surface.If coefficient of friction is μ=kx,where k is constant and μ exist for 0≤ x≤ L (i.e for x&gt;L friction is zero.). If rod moves towards the right, magnitude of work done by friction is:

A solid cylinder of mass M and radius R rolls down an inclined plane of height h. The angular velocity of cylinder when it reches bottom of plane will

What is deviation of light

In a compound microscope, the focal length of objective lens is 1.2 cm and that of eyepiece is 3 cm. When the object is kept at 1.25 cm in front of the objective, the final image is formed at infinity. Magnifying power of the compound microscope is

Find the derivative of sin(x+a) where a is a fixed non-zero constant.

A planet of mass m moves along an ellipse so that perihelion and aphelion distances are r1 and r2 respectively. Find the angular momentum of the planet. Assume Ms to be the mass of the sun.

An elevator car, whose floor to ceiling distance is equal to 2.7 m, starts ascending with constant acceleration of 1.2ms−2. 2 sec after the start, a bolt begins fallings from the ceiling of the car. The free fall time of the bolt is

is speed always equal to ins†an teneous speed and velocity always equal to ins†an teneous velocity

A small mass m is transferred from the centre of a hollow sphere of mass M and radius R to infinity. During this process W1=100 kJ amount work is done. If instead of a hollow sphere, a solid sphere of mass M2 and radius R3 were there, then W2 amount of work is done. The W2 will be

A particle is moving with uniform acceleration along a straight line ABC. Its velocity at'A' and 'B'are 6 m/s and 9 m/s respectively.If AB BC 5:16 then its velocity at 'C' is

A metallic ball of mass 20 kg moving with a velocity of 5 m/s collides with a small plastic ball of mass 5 g initially at rest. What is the final velocity of the plastic ball?

Determine apparent depth of the beaker.

Explain the whole potentiometer , its working and applications also?

101 two unequal and opposite force are applied tangentionally to form a uniform disc of mass m and radius r.if the disc is pivotedc at its centre and is free to rotate in its plane,the angular acceleration of the disc is ?

Two particles of masses \(m_1 and are separated by a distance r. If the masses are interchanged, the shift in the centre of mass of the system will be

The force required to stretch a steel wire of 1cm2 cross - section to 1.1 times its length would be (Y=2×1011Nm−2)

A man is running with velocity 5km/h towards east and rain is falling vertically down with speed 5km/h. Direction of rain w.r.t man is-(a) 30 degree with vertical (b) 60 degree with vertical (c) 45 degree with vertical (d) 90 degree with vertical

Molecular weight of X2O3 is 326.the equivalent weight of X is?

A uniform rod of length L and mass m is placed on rough horizontal surface.If coefficient of friction is μ=kx,where k is constant and μ exist for 0≤ x≤ L (i.e for x>L friction is zero.). If rod moves towards the right, magnitude of work done by friction is: